1
|
Chen W, Zheng Y, Zhu Y, Liu D, Zhu L. Pharmacokinetics, tissue distribution, and plasma protein binding ratio of bicuculline following intragastric and intravenous administration in rats using ultra-high-performance liquid chromatography-tandem mass spectrometry. Biomed Chromatogr 2024; 38:e5802. [PMID: 38110194 DOI: 10.1002/bmc.5802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/08/2023] [Accepted: 11/16/2023] [Indexed: 12/20/2023]
Abstract
Bicuculline is a natural isoquinoline alkaloid that works as a gamma-aminobutyric acid receptor antagonist. It is widely found in Papaveraceae plants used in traditional Chinese medicines. Bicuculline not only has been shown to have favorable analgesic, memory-improving, and anxiolytic effects but may also cause adverse effects such as convulsions and epilepsy. A simple, rapid, and sensitive method was developed and validated for the determination of bicuculline in the plasma and tissue samples in rats by ultra-high-performance liquid chromatography-tandem mass spectrometry (MS/MS). The chromatographic separation was performed on a Thermo Scientific C18 column. The MS/MS system was operated in the positive multiple reaction monitoring mode, and the precursor-product ion transitions were optimized as m/z 368.0 → 307.1 for bicuculline and as 354.1 → 188.1 for protopine (internal standard). The linearity, accuracy, precision, recovery, and matrix effect were within acceptable limits. The experimental data showed that bicuculline was rapidly absorbed and eliminated in rats, with a moderate plasma protein binding ratio and low bioavailability. The main tissues of distribution were the kidney, liver, and brain; bicuculline could exert its pharmacological effects across the blood-brain barrier. This study has positive implications for the clinical use of herbal medicines containing bicuculline and for further development.
Collapse
Affiliation(s)
- Weikang Chen
- Jiangxi Institute for Drug Control/Jiangxi Engineering Research Center for Drug and Medical Device Quality, Nanchang, China
- National Medical Products Administration Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, China
| | - Yangbin Zheng
- Jiangxi Institute for Drug Control/Jiangxi Engineering Research Center for Drug and Medical Device Quality, Nanchang, China
- National Medical Products Administration Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, China
| | - Yanyan Zhu
- Jiangxi Institute for Drug Control/Jiangxi Engineering Research Center for Drug and Medical Device Quality, Nanchang, China
- National Medical Products Administration Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, China
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Dehong Liu
- Jiangxi Institute for Drug Control/Jiangxi Engineering Research Center for Drug and Medical Device Quality, Nanchang, China
- National Medical Products Administration Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, China
| | - Lianghui Zhu
- Jiangxi Institute for Drug Control/Jiangxi Engineering Research Center for Drug and Medical Device Quality, Nanchang, China
- National Medical Products Administration Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, China
| |
Collapse
|
2
|
Petzold GC, Dreier JP. Spreading depolarization evoked by endothelin-1 is inhibited by octanol but not by carbenoxolone. BRAIN HEMORRHAGES 2021. [DOI: 10.1016/j.hest.2020.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
3
|
De Luca C, Gori S, Mazzucchi S, Dini E, Cafalli M, Siciliano G, Papa M, Baldacci F. Supersaturation of VEP in Migraine without Aura Patients Treated with Topiramate: An Anatomo-Functional Biomarker of the Disease. J Clin Med 2021; 10:jcm10040769. [PMID: 33671875 PMCID: PMC7918918 DOI: 10.3390/jcm10040769] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 01/31/2021] [Accepted: 02/11/2021] [Indexed: 12/15/2022] Open
Abstract
Migraine is a primary headache with high prevalence among the general population, characterized by functional hypersensitivity to both exogenous and endogenous stimuli particularly affecting the nociceptive system. The hyperresponsivity of cortical neurons could be due to a disequilibrium in the excitatory/inhibitory signaling. This study aimed to investigate the anatomo-functional pathway from the retina to the primary visual cortex using visual evoked potentials (VEP). Contrast gain protocol was used in 15 patients diagnosed with migraine without aura (at baseline and after 3 months of topiramate therapy) and 13 controls. A saturation (S) index was assessed to monitor the response of VEP’s amplitude to contrast gain. Non-linear nor monotone growth of VEP (S < 0.95) was defined as supersaturation. A greater percentage of migraine patients (53%) relative to controls (7%) showed this characteristic. A strong inverse correlation was found between the S index and the number of days separating the registration of VEP from the next migraine attack. Moreover, allodynia measured through the Allodynia Symptoms Check-list (ASC-12) correlates with the S index both at baseline and after 3 months of topiramate treatment. Other clinical characteristics were not related to supersaturation. Topiramate therapy, although effective, did not influence electrophysiological parameters suggesting a non-intracortical nor retinal origin of the supersaturation (with possible involvement of relay cells from the lateral geniculate nucleus). In conclusion, the elaboration of visual stimuli and visual cortex activity is different in migraine patients compared to controls. More data are necessary to confirm the potential use of the S index as a biomarker for the migraine cycle (association with the pain-phase) and cortical sensitization (allodynia).
Collapse
Affiliation(s)
- Ciro De Luca
- Laboratory of Morphology of Neuronal Network, Department of Public Medicine, University of Campania “Luigi Vanvitelli”, 80138 Napoli, Italy;
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
- Correspondence:
| | - Sara Gori
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
| | - Sonia Mazzucchi
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
| | - Elisa Dini
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
| | - Martina Cafalli
- Unit of Neurorehabilitation, Department of Medical Specialties, University Hospital of Pisa, 56126 Pisa, Italy;
| | - Gabriele Siciliano
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
| | - Michele Papa
- Laboratory of Morphology of Neuronal Network, Department of Public Medicine, University of Campania “Luigi Vanvitelli”, 80138 Napoli, Italy;
- SYSBIO Centre of Systems Biology ISBE.ITALY, University of Milano-Bicocca, 20126 Milano, Italy
| | - Filippo Baldacci
- Neurology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; (S.G.); (S.M.); (E.D.); (G.S.); (F.B.)
| |
Collapse
|
4
|
Zeng X, Niu Y, Qin G, Zhang D, Zhou J, Chen L. Deficiency in the function of inhibitory interneurons contributes to glutamate-associated central sensitization through GABABR2-SynCAM1 signaling in chronic migraine rats. FASEB J 2020; 34:14780-14798. [PMID: 32931071 DOI: 10.1096/fj.202001561r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/11/2020] [Accepted: 08/24/2020] [Indexed: 01/03/2023]
Abstract
The occurrence of pain has always been closely related to a break in the balance between excitatory and inhibitory systems, and the internal relationship between these two systems has not been studied in the pathogenesis of chronic migraine (CM). In this study, we explored how inhibitory interneurons specifically modulate the glutamate-induced hyperexcitability in the periaqueductal gray (PAG) of CM rats. The CM model was established by repeated dural infusion of inflammatory soup (IS) in rats. Then, Baclofen, a gamma-aminobutyric acid type B receptor (GABABR) agonist; CGP35348, a GABABR antagonist; H89, a protein kinase A (PKA) inhibitor; and 8-Bromo-cAMP, a PKA agonist, were applied by intraventricular injection to investigate the detailed CM mechanism. Our results showed that GABABR2 mRNA and protein levels were significantly downregulated (P < .01) in the PAG of CM rats. Similarly, gamma-aminobutyric acid (GABA) and its synthetase glutamate decarboxylase 65/67 (GAD65/67) seriously decreased (P < .01), implying a deficit in the function of inhibitory interneurons in the PAG of CM rats. Afterward, the application of Baclofen and H89 alleviated the IS-evoked hyperalgesia and extenuated vesicular glutamate transporter 2 (VGLUT2), glutamate, calcitonin gene-related peptide (CGRP), and c-Fos expression by regulating the GABABR2/PKA/SynCAM1 pathway in the PAG of CM rats, while the application of CGP35348 and 8-Bromo-cAMP exactly exerted the opposite effect. Importantly, CGP35348 induced an elevation of CGRP, and VGLUT2 expression was relieved by H89. These data suggest that the loss in the function of inhibitory interneurons contributes to glutamate-associated central sensitization through the GABABR2/PKA/SynCAM1 pathway in the PAG of CM rats.
Collapse
Affiliation(s)
- Xiaoxu Zeng
- Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yingying Niu
- Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guangcheng Qin
- Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Dunke Zhang
- Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiying Zhou
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Lixue Chen
- Laboratory Research Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
5
|
Jansen NA, Dehghani A, Linssen MML, Breukel C, Tolner EA, van den Maagdenberg AMJM. First FHM3 mouse model shows spontaneous cortical spreading depolarizations. Ann Clin Transl Neurol 2019; 7:132-138. [PMID: 31880072 PMCID: PMC6952313 DOI: 10.1002/acn3.50971] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 12/07/2019] [Indexed: 01/19/2023] Open
Abstract
Here we show, for the first time, spontaneous cortical spreading depolarization (CSD) events - the electrophysiological correlate of the migraine aura - in animals by using the first generated familial hemiplegic migraine type 3 (FHM3) transgenic mouse model. The mutant mice express L263V-mutated α1 subunits in voltage-gated NaV 1.1 sodium channels (Scn1aL263V ). CSDs consistently propagated from visual to motor cortex, recapitulating what has been shown in patients with migraine with aura. This model may be valuable for the preclinical study of migraine with aura and other diseases in which spreading depolarization is a prominent feature.
Collapse
Affiliation(s)
- Nico A Jansen
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Anisa Dehghani
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Margot M L Linssen
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Cor Breukel
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Else A Tolner
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.,Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | - Arn M J M van den Maagdenberg
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.,Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
6
|
Klass A, Sánchez-Porras R, Santos E. Systematic review of the pharmacological agents that have been tested against spreading depolarizations. J Cereb Blood Flow Metab 2018; 38:1149-1179. [PMID: 29673289 PMCID: PMC6434447 DOI: 10.1177/0271678x18771440] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Spreading depolarization (SD) occurs alongside brain injuries and it can lead to neuronal damage. Therefore, pharmacological modulation of SD can constitute a therapeutic approach to reduce its detrimental effects and to improve the clinical outcome of patients. The major objective of this article was to produce a systematic review of all the drugs that have been tested against SD. Of the substances that have been examined, most have been shown to modulate certain SD characteristics. Only a few have succeeded in significantly inhibiting SD. We present a variety of strategies that have been proposed to overcome the notorious harmfulness and pharmacoresistance of SD. Information on clinically used anesthetic, sedative, hypnotic agents, anti-migraine drugs, anticonvulsants and various other substances have been compiled and reviewed with respect to the efficacy against SD, in order to answer the question of whether a drug at safe doses could be of therapeutic use against SD in humans.
Collapse
Affiliation(s)
- Anna Klass
- Neurosurgery Department, University of Heidelberg, Heidelberg, Germany
| | | | - Edgar Santos
- Neurosurgery Department, University of Heidelberg, Heidelberg, Germany
| |
Collapse
|
7
|
Hunanyan AS, Helseth AR, Abdelnour E, Kherallah B, Sachdev M, Chung L, Masoud M, Richardson J, Li Q, Nadler JV, Moore SD, Mikati MA. Mechanisms of increased hippocampal excitability in the Mashl +/- mouse model of Na + /K + -ATPase dysfunction. Epilepsia 2018; 59:1455-1468. [PMID: 29889309 DOI: 10.1111/epi.14441] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2018] [Indexed: 12/29/2022]
Abstract
OBJECTIVE Na+ /K+ -ATPase dysfunction, primary (mutation) or secondary (energy crisis, neurodegenerative disease) increases neuronal excitability in the brain. To evaluate the mechanisms underlying such increased excitability we studied mice carrying the D801N mutation, the most common mutation causing human disease, specifically alternating hemiplegia of childhood (AHC) including epilepsy. Because the gene is expressed in all neurons, particularly γ-aminobutyric acid (GABA)ergic interneurons, we hypothesized that the pathophysiology would involve both pyramidal cells and interneurons and that fast-spiking interneurons, which have increased firing rates, would be most vulnerable. METHODS We performed extracellular recordings, as well as whole-cell patch clamp recordings from pyramidal cells and interneurons, in the CA1 region on hippocampal slices. We also performed immunohistochemistry from hippocampal sections to count CA1 pyramidal cells as well as parvalbumin-positive interneurons. In addition, we performed video-electroencephalography (EEG) recordings from the dorsal hippocampal CA1 region. RESULTS We observed that juvenile knock-in mice carrying the above mutation reproduce the human phenotype of AHC. We then demonstrated in the CA1 region of these mice the following findings as compared to wild type: (1) Increased number of spikes evoked by electrical stimulation of Schaffer collaterals; (2) equalization by bicuculline of the number of spikes induced by Schaffer collateral stimulation; (3) reduced miniature, spontaneous, and evoked inhibitory postsynaptic currents, but no change in excitatory postsynaptic currents; (4) robust action potential frequency adaptation in response to depolarizing current injection in CA1 fast-spiking interneurons; and (5) no change in the number of pyramidal cells, but reduced number of parvalbumin positive interneurons. SIGNIFICANCE Our data indicate that, in our genetic model of Atp1α3 mutation, there is increased excitability and marked dysfunction in GABAergic inhibition. This supports the performance of further investigations to determine if selective expression of the mutation in GABAergic and or glutamatergic neurons is necessary and sufficient to result in the behavioral phenotype.
Collapse
Affiliation(s)
- Arsen S Hunanyan
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Ashley R Helseth
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Elie Abdelnour
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Bassil Kherallah
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Monisha Sachdev
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Leeyup Chung
- Department of Neurobiology, Duke University School of Medicine, Durham, NC, USA
| | - Melanie Masoud
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Jordan Richardson
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Qiang Li
- Durham Veterans Affairs Medical Center, Durham, NC, USA.,Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA.,Veterans Affairs Mid-Atlantic Region Mental Illness Research, Education, and Clinical Center, Durham, NC, USA
| | - J Victor Nadler
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC, USA
| | - Scott D Moore
- Durham Veterans Affairs Medical Center, Durham, NC, USA.,Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA.,Veterans Affairs Mid-Atlantic Region Mental Illness Research, Education, and Clinical Center, Durham, NC, USA
| | - Mohamad A Mikati
- Division of Pediatric Neurology, Department of Pediatrics, Duke University Medical Center, Durham, NC, USA.,Department of Neurobiology, Duke University School of Medicine, Durham, NC, USA
| |
Collapse
|
8
|
García-Martín E, Martínez C, Serrador M, Alonso-Navarro H, Navacerrada F, Esguevillas G, García-Albea E, Agúndez JAG, Jiménez-Jiménez FJ. Gamma-Aminobutyric Acid (Gaba) Receptors Rho (Gabrr)
Gene Polymorphisms and Risk for Migraine. Headache 2017; 57:1118-1135. [DOI: 10.1111/head.13122] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 04/19/2017] [Accepted: 04/19/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Elena García-Martín
- Department of Pharmacology; University of Extremadura; Cáceres Spain
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- AMGenomics, Edificio Tajo; Avda. de la Universidad s/n Cáceres Spain
| | - Carmen Martínez
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- Department of Pharmacology; University of Extremadura; Badajoz Spain
| | - Mercedes Serrador
- Department of Family Medicine; Hospital “Príncipe de Asturias,”, Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - Hortensia Alonso-Navarro
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - Francisco Navacerrada
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Service of Neurology; Hospital “Ramón y Cajal,”, Universidad de Alcalá; Madrid Spain
| | - Gara Esguevillas
- Department of Pharmacology; University of Extremadura; Cáceres Spain
| | - Esteban García-Albea
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
| | - José A. G. Agúndez
- Department of Pharmacology; University of Extremadura; Cáceres Spain
- Red de Investigación de reacciones adversas a alergenos y fármacos; Instituto de Salud Carlos III; Madrid Spain
- AMGenomics, Edificio Tajo; Avda. de la Universidad s/n Cáceres Spain
| | - Félix Javier Jiménez-Jiménez
- Section of Neurology; Hospital Universitario del Sureste; Arganda del Rey Madrid Spain
- Department of Medicine-Neurology; Hospital “Príncipe de Asturias,” Universidad de Alcalá; Alcalá de Henares Madrid Spain
| |
Collapse
|
9
|
Richter F, Eitner A, Leuchtweis J, Bauer R, Lehmenkühler A, Schaible HG. Effects of interleukin-1ß on cortical spreading depolarization and cerebral vasculature. J Cereb Blood Flow Metab 2017; 37:1791-1802. [PMID: 27037093 PMCID: PMC5435277 DOI: 10.1177/0271678x16641127] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 01/26/2016] [Accepted: 02/22/2016] [Indexed: 11/16/2022]
Abstract
During brain damage and ischemia, the cytokine interleukin-1ß is rapidly upregulated due to activation of inflammasomes. We studied whether interleukin-1ß influences cortical spreading depolarization, and whether lipopolysaccharide, often used for microglial stimulation, influences cortical spreading depolarizations. In anaesthetized rats, cortical spreading depolarizations were elicited by microinjection of KCl. Interleukin-1ß, the IL-1 receptor 1 antagonist, the GABAA receptor blocker bicuculline, and lipopolysaccharide were administered either alone or combined (interleukin-1ß + IL-1 receptor 1 antagonist; interleukin-1ß + bicuculline; lipopolysaccharide + IL-1 receptor 1 antagonist) into a local cortical treatment area. Using microelectrodes, cortical spreading depolarizations were recorded in a non-treatment and in the treatment area. Plasma extravasation in cortical grey matter was assessed with Evans blue. Local application of interleukin-1ß reduced cortical spreading depolarization amplitudes in the treatment area, but not at a high dose. This reduction was prevented by IL-1 receptor 1 antagonist and by bicuculline. However, interleukin-1ß induced pronounced plasma extravasation independently on cortical spreading depolarizations. Application of lipopolysaccharide reduced cortical spreading depolarization amplitudes but prolonged their duration; EEG activity was still present. These effects were also blocked by IL-1 receptor 1 antagonist. Interleukin-1ß evokes changes of neuronal activity and of vascular functions. Thus, although the reduction of cortical spreading depolarization amplitudes at lower doses of interleukin-1ß may reduce deleterious effects of cortical spreading depolarizations, the sum of interleukin-1ß effects on excitability and on the vasculature rather promote brain damaging mechanisms.
Collapse
Affiliation(s)
- Frank Richter
- Institute of Physiology I/Neurophysiology, Jena University Hospital – Friedrich Schiller University Jena, Jena, Germany
| | - Annett Eitner
- Institute of Physiology I/Neurophysiology, Jena University Hospital – Friedrich Schiller University Jena, Jena, Germany
| | - Johannes Leuchtweis
- Institute of Physiology I/Neurophysiology, Jena University Hospital – Friedrich Schiller University Jena, Jena, Germany
| | - Reinhard Bauer
- Institute of Molecular Cell Biology, Jena University Hospital – Friedrich Schiller University Jena, Jena, Germany
| | | | - Hans-Georg Schaible
- Institute of Physiology I/Neurophysiology, Jena University Hospital – Friedrich Schiller University Jena, Jena, Germany
| |
Collapse
|
10
|
Wang Y, Li Y, Wang M. Involvement of CGRP receptors in retinal spreading depression. Pharmacol Rep 2016; 68:935-8. [PMID: 27362770 DOI: 10.1016/j.pharep.2016.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/22/2016] [Accepted: 05/05/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Cortical spreading depression (CSD) is a transient propagating excitation of synaptic activity followed by depression, which is implicated in migraine with aura and is regarded as the underlying cause of migraine. Calcitonin-gene related peptide (CGRP) receptors play a crucial role in mediating the magnitude of CSD in rat cortical slice. This study aimed to examine whether CGRP receptors are involved in retinal spreading depression (RSD) in chicks. METHODS Western blot was used for detection of calcitonin-receptor like receptor (CALCRL) and intrinsic optical imaging was used for pharmacological investigation. RESULTS We found that the key component of CGRP receptor, CALCRL, is expressed in the chick retina. Using an in vitro migraine RSD model, we demonstrated that BIBN4096, a potent antagonist for CGRP receptors, markedly reduced the magnitude of RSD induced by K(+), but also the propagation rate. CONCLUSIONS The data suggest that CGRP receptors mediate RSD propagation involving neuronal mechanism and approve that RSD is an efficient in vitro approach for assessing anti-migraine drugs targeting CGRP receptors.
Collapse
Affiliation(s)
- Yan Wang
- Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, PR China
| | - Yanli Li
- Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, PR China
| | - Minyan Wang
- Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, PR China; Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, PR China.
| |
Collapse
|
11
|
Bu F, Du R, Li Y, Quinn JP, Wang M. NR2A contributes to genesis and propagation of cortical spreading depression in rats. Sci Rep 2016; 6:23576. [PMID: 27001011 PMCID: PMC4802317 DOI: 10.1038/srep23576] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/08/2016] [Indexed: 11/09/2022] Open
Abstract
Cortical spreading depression (CSD) is a transient propagating excitation of synaptic activity followed by depression, which is implicated in migraine. Increasing evidence points to an essential role of NR2A-containing NMDA receptors in CSD propagation in vitro; however, whether these receptors mediate CSD genesis in vivo requires clarification and the role of NR2A on CSD propagation is still under debate. Using in vivo CSD in rats with electrophysiology and in vitro CSD in chick retina with intrinsic optical imaging, we addressed the role of NR2A in CSD. We demonstrated that NVP-AAM077, a potent antagonist for NR2A-containing receptors, perfused through microdialysis probes, markedly reduced cortex susceptibility to CSD, but also reduced magnitude of CSD genesis in rats. Additionally, NVP-AAM077 at 0.3 nmol perfused into the contralateral ventricle, considerably suppressed the magnitude of CSD propagation wave and propagation rate in rats. This reduction in CSD propagation was also observed with TCN-201, a negative allosteric modulator selective for NR2A, at 3 μM, in the chick retina. Our data provides strong evidence that NR2A subunit contributes to CSD genesis and propagation, suggesting drugs selectively antagonizing NR2A-containing receptors might constitute a highly specific strategy treating CSD associated migraine with a likely better safety profile.
Collapse
Affiliation(s)
- Fan Bu
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China.,Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - Ruoxing Du
- Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - Yi Li
- Department of Applied Chemistry, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - John P Quinn
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Minyan Wang
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China.,Centre for Neuroscience, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| |
Collapse
|
12
|
Jia Y, Zhou J, Bu F, Wang M. Synergistic Suppression of Cortical Spreading Depression under NR2A and NR2B Inhibition. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/pp.2015.612059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|